Interchangeable and adjustable screw-driver and combined tool-holder.



PATENTED MAY 28; 1907. I 'v. E. CAMPBELL. IN-TERGHANGEABLEAND ADJUSTABLESCREW DRIVER AND COMBINED TOOL HOLDER.

APPLICATION FILED NOV.14, 1906.

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3 Q @Q Q N h k WITNESSES [NVENTOR' A TTORNE VS UNITED STATES PATENTOFFICE.

VICTOR E. CAMPBELL, OF PORTLAND, OREGON.

INTERCHANGEABLE AND ADJUSTABLESCREW-DRIVER AND COMBINED TOOL-HOLDER.

Specification of Letters Patent.

Patented May 28, 1907.

Application filed November 14,1906. Serial No. 343,423.

To all whom it may concern:

Be it known that I, VICTOR E. CAMPBELL, a citizen of the United States,residing at Portland, in the county of Multnomah and State of Oregon,have invented a new and useful Interchangeable and Adjustable Screw-Driver and Combined Tool-Holder, of which the following is aspecification.

This invention relates to screw-drivers of that general class especiallydesigned for use by jewelers and similar persons and has for its objectto provide a comparatively simple and inexpensive tool of this characterhaving a plurality of interchangeable bits or blades whereby the toolmay be used for positioning or removing screws of different sizes.

A further object of the invention is to provide a tool having a pair ofspring clamping jaws the shanks of which are bowed inwardly thereby toengage the bit or blade and prevent accidental displacement of the samewhile positioning said blade in the holder.

A further object is to provide a detachable bit or blade having itsopposite longitudinal edges serrated or roughened and its side facesprovided with laterally extending pins adapted to engage correspondinggrooves in the clamping jaws so as to lock the blade against lateralmovement.

A still further object of the invention is to generally improve thisclass of devices so as to increase their utility, durability andefficiency as well as to reduce the cost of manufacture.

With these and other objects in view the invention consists in theconstruction and novel combination and arrangement of parts hereinafterfully described, and illustrated in the accompanying drawings, it beingunder stood that various changes in form, propor tions and minor detailsof construction may be resorted to within the scope of the appendedclaims.

In the accompanying drawings forming a part of this specification:Figure 1 is a per spective view of an implement constructed inaccordance with my invention. Fig. 2 is a longitudinal sectional view ofthe same. Fig. 3 is a front elevation of the tool. Fig. 4 is aperspective view of the clamping jaws detached. Fig. 5 is a similar viewof one of the removable bits or blades.

Similar numerals of reference indicate corwith an inwardly extendingflange 6 having alined slots or recesses? formed therein for the purposehereinafter referred to.

Slidably mounted within the barrel or casing 5 is a rod or piston 8 oneend of which is seated in a recess or socket 9 formed in the adjacentend of a handle 10, said handle and rod being detachably securedtogether by means of a pin 11 engaging alined openings formed in thewalls of the socket and the adjacent end of the rod, respectively.

Threaded in the handle 10 adjacent the socket 9 is a pin or stud 12 thefree end of which engages the walls of an elongated slot 13' formed inthe barrel or casing 5 thereby to limit the longitudinal movement of thepiston 8.

The free end of the handle 10 is provided with a reduced extension 14 onwhich is swiveled a finger piece 15 whereby the casing together with thepiston may be rotated inde pendently of the finger piece.

Secured in any suitable manner to therod or piston 8 are the shanks 16of a pair of spring clamping jaws 17 the latter being adapted to receiveand support a removable bit or blade 18.

The clamping jaws 17 are provided with central longitudinally disposedgrooves or channels 19 adapted to receive a pin or stud 20 extendinglaterally from the side faces of the bit 18 thereby to prevent lateraldisplacement of. said bit, there being spaced grooves 21 formed in theadjacent faces of the clamping jaws and defining bearing surfaces 22'adapted to engage the blade, as shown.

The free ends of the clamping jaws are reduced to form an annular flange23 whereby the jaws may be used for removing the small balance screws ofwatches and the like when the blade 18 is detached.

Attention is here called to the fact that the intermediate portions ofthe spring shanks 16 are bowed laterally for engagement with theadjacent end of theblade 18 thereby to assist in preventing accidentaldisplacement of the blade while positioning the same within the holder.

i The blades 18 which may be made in different sizes and shapes are eachinclined or beveled at their active ends and are provided on theiropposite longitudinal edges with serrations or roughened portions 24thereby to assist in removing the bit from the clamping jaws when thelatter are released. The adjacent faces of the clamping jaws 17 are alsopreferably provided. with alined notches or recesses 25 adapted toreceive the head of an ordinary screw when the device is used forpositioning screws without the employment of the detachable blades.

The interior walls of the casing 5 are provided with an annular shoulder26 and interposed between said shoulder and the adjacent end of thehandle 10 is a coiled spring 27 adapted to force the inclined faces 28of the jaws in engagement with the flange 6 of said casing and thusclamp the jaws against the blade 18, it being here explained that thenotches 7 are for the purpose of guiding the blade between the jaws andwithin the casing 5.

In using the device a longitudinal pressure is exerted on the fingerpiece 15 which expands the j aws 17 thus permitting the blade orscrew-driver 18 to be positioned between said jaws after which thepressure is removed from the finger piece 15 thus causing the spring 17to retract the jaws and move the same to closed position in engagementwith said blade.

In order to detach the several parts comprising the tool it is merelynecessary to remove the screw 12 and move the piston 8 longitudinallyand laterally within the casing 5 until the pin 11 registers with alinedopenings 29 formed in the walls of the casing 5 when the pin may beremoved by introducing a suitable tool within the opening and pressinglaterally on said pin thus permitting the handle to be detached from thepiston and the latter together with the jaws to be withdrawn through theflanged end of the casing.

The blades or screw-drivers 18 may be made in different thickness toaccommodate screws of different sizes and if desired other suitabletools such as a milling tool, double edged saw, escapement file or thelike may be supported within the clamping jaws in place of thescrew-driver shown and described.

1 While the -tool is principally designed for use by jewelers it isobvious that the same may be employed by carpenters and similar personsif desired.

Having thus described the invention what is claimed is:

1. An implement of the class described comprising a casing having oneend thereof provided with an inwardly extending flange, clamping jawscarried by the casing and adapted to receive a tool, said clamping jawsbeing provided with laterally curved spring shanks adapted to engage theadjacent end of the tool, there being alined recesses formed in theflange for the reception of said tool.

2. An implement of the class described comprising a casing, a rodslidably mounted within the casing and provided with a terminal handle,clamping jaws secured to the rod and having their adjacent facesprovided with longitudinal channels, a tool interposed between the jawsand provided with a laterally extending pin adapted to engage the wallsof the channel, said jaws being provided with spring shanks having theircentral portions bowed laterally and adapted to engage the adjacent edgeof the tool, and a spring arranged within the casing for holding the rodin retracted position.

3. An implement of the class described comprising a casing having itsinterior walls formed with an annular shoulder, a rod mounted forlongitudinal movement within the casing and provided with a pairof'clamping jaws adapted to engage one end of a tool, the intermediateportions of the jaws being curved laterally to form spring shanksadapted to engage the opposite end of the tool, a handle secured to therod and provided with a terminal finger piece, and a spring interposedbetween the shoulder and the handle for holding the rod in retractedposition.

4. An implement of the class described comprising a casing, a pair ofclamping jaws carried by the casing and adapted to engage a tool, saidclamping jaws being provided with intermediate laterally curved springshanks ada ted to engage the adjacent end of a tool, the ee ends of thejaws being reduced to form a terminal annular flange, a rod slidablymounted within the casing and connected with the shanks of the jaws, ahandle secured to the rod and having a finger piece swiveled on the freeend thereof, and a spring coiled around the rod for normally holding thesame in retracted position.

5. An implement of the class described comprising a casing having anelongated slot formed therein and provided with alined o enings, a pairof clamping jaws carried by t e casing and adapted to engage a tool, arod connected with the clamping jaws, a handle having a socket formed inone end thereof for the reception of the rod, a pin connecting thehandle and rod and adapted to register with the openings in the casing,a screw carried by-the handle and engaging the walls of the slot forlimiting the movement of the rod, and a s ring coiled around the rod fornormally hol ing the same in retracted position.

6. An implement of the class described ineluding a casing provided atone end with an inwardly extending flange having alined recesses formedtherein, spring clamping jaws seated within the casing and having theirad- IIO nels, a blade interposed between the jaws and with the flange.

seated in said recesses, said blade being pro- In testimony that I claimthe foregoing as Vided with oppositely disposed pins adapted my own, Ihave hereto affixed my signature to engage the walls of adjacentchannels, the in the presence of two witnesses. longitudinal edges ofthe blade being serrated VICTOR E. CAMPBELL. thereby to present aroughened gripping sur- Witnesses: face, and a spring disposed withinthe casing N. CAMPBELL, and operatively connected with the jaws forTHos. E. HUHNE.

jacent faces rovided with lon 'tudinal chan- 'eldabl su ortin the samein contact 10 P g1 Y Y PP o

